Oxygen vacancies in actiniae-like Nb2O5/Nb2C MXene heterojunction boosting visible light photocatalytic NO removal

Yuwei Wang; Xueshan Hu; Haoran Song; Yang Cai; Zhuo Li; Daoyuan Zu; Peixin Zhang; Daotong Chong; Ningbo Gao; Yongming Shen; Changping Li

doi:10.1016/j.apcatb.2021.120677

Oxygen vacancies in actiniae-like Nb₂O₅/Nb₂C MXene heterojunction boosting visible light photocatalytic NO removal

Yuwei Wang
, Xueshan Hu
, Haoran Song
, Yang Cai
, Zhuo Li
, Daoyuan Zu
, Peixin Zhang
, Daotong Chong
, Ningbo Gao
, Yongming Shen
, Changping Li

School of Energy and Power Engineering

Dongguan University of Technology
Xi'an Jiaotong University
Shenzhen University
Guangdong University of Technology

Research output: Contribution to journal › Article › peer-review

109 Scopus citations

Abstract

Photocatalytic oxidation is a green and energy-saving technology for removing the low concentration NO in ambient atmosphere. High efficient and stable photocatalysts are essential for achieving excellent NO conversion effect. In this work, oxygen vacancy-rich Nb₂O₅/Nb₂C heterojunction photocatalysts were prepared from Nb₂C MXene by hydrothermal process and heat treatment in H₂/Ar. The (001) facet-dominant Nb₂O₅ nanorods in-situ grown on Nb₂C MXene formed an actiniae-like structure, which promotes the active site exposure and enlarges the reaction interface. Under visible light, the optimized photocatalyst exhibits excellent NO removal rates in the relative humidity range of 25–75%. Mechanism research shows that the oxygen vacancies greatly improve the photocatalytic NO oxidation capacity. Oxygen vacancies on (001) facet of Nb₂O₅ nanorods can boost the visible light absorption, effectively adsorb and activate the reactant gas. The separation of photogenerated carriers was synergistically enhanced by the oxygen vacancies and Nb₂O₅/Nb₂C heterojunction.

Original language	English
Article number	120677
Journal	Applied Catalysis B: Environmental
Volume	299
DOIs	https://doi.org/10.1016/j.apcatb.2021.120677
State	Published - 15 Dec 2021

Keywords

NbC MXene
NbO
Nitric oxide
Oxygen vacancy
Photocatalysis

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10.1016/j.apcatb.2021.120677

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title = "Oxygen vacancies in actiniae-like Nb2O5/Nb2C MXene heterojunction boosting visible light photocatalytic NO removal",

abstract = "Photocatalytic oxidation is a green and energy-saving technology for removing the low concentration NO in ambient atmosphere. High efficient and stable photocatalysts are essential for achieving excellent NO conversion effect. In this work, oxygen vacancy-rich Nb2O5/Nb2C heterojunction photocatalysts were prepared from Nb2C MXene by hydrothermal process and heat treatment in H2/Ar. The (001) facet-dominant Nb2O5 nanorods in-situ grown on Nb2C MXene formed an actiniae-like structure, which promotes the active site exposure and enlarges the reaction interface. Under visible light, the optimized photocatalyst exhibits excellent NO removal rates in the relative humidity range of 25–75\%. Mechanism research shows that the oxygen vacancies greatly improve the photocatalytic NO oxidation capacity. Oxygen vacancies on (001) facet of Nb2O5 nanorods can boost the visible light absorption, effectively adsorb and activate the reactant gas. The separation of photogenerated carriers was synergistically enhanced by the oxygen vacancies and Nb2O5/Nb2C heterojunction.",

keywords = "NbC MXene, NbO, Nitric oxide, Oxygen vacancy, Photocatalysis",

author = "Yuwei Wang and Xueshan Hu and Haoran Song and Yang Cai and Zhuo Li and Daoyuan Zu and Peixin Zhang and Daotong Chong and Ningbo Gao and Yongming Shen and Changping Li",

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doi = "10.1016/j.apcatb.2021.120677",

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TY - JOUR

T1 - Oxygen vacancies in actiniae-like Nb2O5/Nb2C MXene heterojunction boosting visible light photocatalytic NO removal

AU - Wang, Yuwei

AU - Hu, Xueshan

AU - Song, Haoran

AU - Cai, Yang

AU - Li, Zhuo

AU - Zu, Daoyuan

AU - Zhang, Peixin

AU - Chong, Daotong

AU - Gao, Ningbo

AU - Shen, Yongming

AU - Li, Changping

PY - 2021/12/15

Y1 - 2021/12/15

N2 - Photocatalytic oxidation is a green and energy-saving technology for removing the low concentration NO in ambient atmosphere. High efficient and stable photocatalysts are essential for achieving excellent NO conversion effect. In this work, oxygen vacancy-rich Nb2O5/Nb2C heterojunction photocatalysts were prepared from Nb2C MXene by hydrothermal process and heat treatment in H2/Ar. The (001) facet-dominant Nb2O5 nanorods in-situ grown on Nb2C MXene formed an actiniae-like structure, which promotes the active site exposure and enlarges the reaction interface. Under visible light, the optimized photocatalyst exhibits excellent NO removal rates in the relative humidity range of 25–75%. Mechanism research shows that the oxygen vacancies greatly improve the photocatalytic NO oxidation capacity. Oxygen vacancies on (001) facet of Nb2O5 nanorods can boost the visible light absorption, effectively adsorb and activate the reactant gas. The separation of photogenerated carriers was synergistically enhanced by the oxygen vacancies and Nb2O5/Nb2C heterojunction.

AB - Photocatalytic oxidation is a green and energy-saving technology for removing the low concentration NO in ambient atmosphere. High efficient and stable photocatalysts are essential for achieving excellent NO conversion effect. In this work, oxygen vacancy-rich Nb2O5/Nb2C heterojunction photocatalysts were prepared from Nb2C MXene by hydrothermal process and heat treatment in H2/Ar. The (001) facet-dominant Nb2O5 nanorods in-situ grown on Nb2C MXene formed an actiniae-like structure, which promotes the active site exposure and enlarges the reaction interface. Under visible light, the optimized photocatalyst exhibits excellent NO removal rates in the relative humidity range of 25–75%. Mechanism research shows that the oxygen vacancies greatly improve the photocatalytic NO oxidation capacity. Oxygen vacancies on (001) facet of Nb2O5 nanorods can boost the visible light absorption, effectively adsorb and activate the reactant gas. The separation of photogenerated carriers was synergistically enhanced by the oxygen vacancies and Nb2O5/Nb2C heterojunction.

KW - NbC MXene

KW - NbO

KW - Nitric oxide

KW - Oxygen vacancy

KW - Photocatalysis

UR - https://www.scopus.com/pages/publications/85114616928

U2 - 10.1016/j.apcatb.2021.120677

DO - 10.1016/j.apcatb.2021.120677

M3 - 文章

AN - SCOPUS:85114616928

SN - 0926-3373

VL - 299

JO - Applied Catalysis B: Environmental

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M1 - 120677

ER -

Oxygen vacancies in actiniae-like Nb₂O₅/Nb₂C MXene heterojunction boosting visible light photocatalytic NO removal

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Keywords

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